Home / 39,942.57-55,353.77-39,378.81

Finding the Fourth Proportional to 39,942.57, 55,353.77 and 39,378.81

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Solution

The fourth proportional to 39,942.57, 55,353.77 and 39,378.81 is: 54,572.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,942.57 : 55,353.77 = 39,378.81 : x
  2. Step 2: Convert to fraction form
    39,942.57/55,353.77 = 39,378.81/x
  3. Step 3: Cross multiply
    39,942.57x = 55,353.77 × 39,378.81
  4. Step 4: Simplify right side
    39,942.57x = 2,179,765,591.61
  5. Step 5: Solve for x
    x = 2,179,765,591.61/39,942.57
  6. Step 6: Final answer
    x = 54,572.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.